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Assertion Sodium metal is stored under Kerosene. Reason Metallic sodium melts when exposed to air.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Correct answer: Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Solution

Sodium is highly reactive, so it is stored under kerosene to keep it away from air and moisture. The reason is taken as correct in this context because exposure to air can cause sodium to soften/melt due to heat from rapid oxidation, which explains the need for kerosene storage.

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